The surname Cahill is of Irish origin, derived from the Gaelic name "Ó Cathail" meaning "descendant of Cathal." The name Cathal itself is believed to mean "battle rule," indicating a possible warrior ancestry. The Cahill surname is predominantly found in Ireland and among Irish diaspora communities around the world.
The last name Cahill is shared by around 20623 Americans, placing it at rank #1737 nationally. That’s nearly 7 per 100,000 people.
Our database contains over 2141 people with the last name Cahill. This surname is most commonly found in California, Florida, Illinois. We have over 3 unique first names combined with the last name Cahill in our records. The most frequent first names associated with this surname are John, Michael, James.
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